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Improvement of piezoelectrically induced PWP method and its comparison with the PEA method
Author(s) -
Satoh Yuki,
Tanaka Yasuhiro,
Takada Tatsuo
Publication year - 1997
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(19971115)121:2<1::aid-eej1>3.0.co;2-a
Subject(s) - materials science , space charge , resolution (logic) , dielectric , acoustics , high resolution , electronic engineering , optoelectronics , physics , computer science , engineering , remote sensing , quantum mechanics , artificial intelligence , geology , electron
The pulsed electroacoustic (PEA) method and the piezoelectrically induced pressure wave propagation (PIPWP) method are compared. While the PEA method has been widely used as a measurement technique to observe space charge distributions in solid dielectric materials, the PIPWP method has not been widely used because of its relatively lower spatial resolution as compared to that of the PEA method. Therefore, in this research, an attempt has been made to improve the resolution of the PIPWP method. In this paper, principles of the generation and the detection of pressure waves in both PEA and PIPWP methods are summarized. Furthermore, the two methods are compared through observations of the generation, drift, and trapping of carriers in an organic photoconductor (OPC). © 1997 Scripta Technica, Inc. Electr Eng Jpn, 121(2): 1–7, 1997